Carbureter.



H. CARLE.

CARBURETER,

APPLICATION FILED AUG.24.19l6

1 4:8,S8n Patented 00 5. 1917.

3 SHEETS-S 1.

WI T/VESSES lIl VE/VTOR ATTORNEYS H. CABLE.

CARBURETER.

APPLICATION FILED AUG.24. 191s.

Patented 0st. 16,1917.

3 SHEETSSHEET 2.

m m w w 4TTORNEYS t. 4 iii/1i ul'llll'llllll H. CARLE.

CARBURETER.

3 SHEETS SHEET 3.

WITNESSES 4 I IIVI/E/VTOR BY I -'" ATTORNEYS APPLICATION FILED AUG.24. I916- Patgnted Oct. 16,

:11 LE, O'F: BUFFALO, NEW YORK, ASSIG'NDR TU CARLE'MOTOR'PB COQ'Q,

BUFFALO, NEW YURTK, A. CORPORATION 'OF'IIEW' YORK.

GAZRHURIEPIYEB.

Specification .11 Letters 1am. Wm;

tea @wh f6, new.

. Application filed. August 24, 1916. Serial No. 116,599.

To all whom it may concern 1' Be it known that I, HAROLD CARL a subject of the King of Great Britain, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Carburetors, of which the following is a full, clear, and exact: description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to oil feeding devices, and especially to devices of'the character referred to for feeding fuel to internal combustion engines and controlling the mixture of air arid fuel.

One of the objects of the invention is 'the provision of a practical apparatus for utilizing to better advantage that part of the power of the enginewhichis consumed in feeding fuel, so that'the feedin of the fuel and the carbureting may be obtained with the consumption of less 'energy than hereto fore, resulting in increased mileage.

l as for instance floats, check va Another ob ect is the provision of a simple device for maintaining an auxiliary supply of fuel immediately responsive to the suction of the engine and not dependent ona gravity head of themain supply of fuel or that of the. auxiliary supply.

Another object of'the invention is the provision of a practical device for supplying an internal combustion engine with an efficient mixture when the head of fuel is insufficient to supply the fuel outlet by gravity, and without necessitating the use-of mechanical valvesin the fuel conduit.

Another object of the inventionis to provide, for automobiles driven by internal combustion engines, an efiicient flexible carbureting devlce of a simple character, wherein all moving mechanical paIftSOf the fuel feeding system between the main fuel supply and the liquid fuel outlet ma be omitted,

l ves, etc.

Another object of the invention is to prowide a practical device of the character referred to, wherewith eflicient mixtures for difi'erent speeds may be readily obtained;

Another object of the invention is to provide a device for maintaining a sufficient vacuum effect on the fuel outlet to efliciently feed the fuel when the engine is running, notwithstanding sudden variations in the vacuum effect on the fuel outlet.

Other objects will be in part obvious and in. part. pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth,'and' the scope of'the application of which will be indicated in the following claims, I v

In the accompanying drawings forming part of this specification, wherein similar,

reference characters refer to similar parts throughout the several views,-, Figure 1 is a side elevation of anautomobi e equipped with the invention.

Fig. 2 is a vertical sectional view of one ofthe fuel reservoirs.

Fig. 3 is a face view of an indicator. Fig. 4 is a rear view of-the passageway for the admission of air to the internal combustion engine.

Fig. 5 is an end' view of the construction shown in Fig; 4.

Fig. 6 is an enlarged longitudinal vertical section through Fig. 4'.

Viewed in certain aspects many of the ad'- vantages of the present invention pertain throu h which air- 'is led to the manifold 6' and t ence into the engine for'devel'o ing power. -As will be seen,'it is located a ove; the cylinders so as to heat" the incoming air. As t e engine 0 crates, air is drawn into the engine cylin are by suction through the passa eway formed-by'the intake 5 and the mani old 6, and a manually o erable throttle valve 7 is cmplo'ed to regu ate the admission of air to emerging fromoutlet 9. Suita 1e connections are provided whereby the control of the thrott e valve 7 may be effected convenientl'y by the driver. The numeral 8'indicates a fuel conduit having a fuel outlet 9'; the numeral 10 indicates a chamber, or

e carbureted b the fuel auxiliary fuel reservoir, and the numeral 11 Q amain reservoir, the latter adapted to supply, ordeliver, fuel to the auxiliary reservoir. The :fuel outlet 9 is adapted to be subjeoted to'the variations of external pressure in the air passageway, and prefera ly projects intothe passageway in the path of the incoming air and between the manually operable valve and the engine. The fuel conduit 8 conducts fuel from the auxiliary resbeing below the level of the outlet 9. When the fuel is drawn directly from the main reservoir to the engine, the power of the engine has to be expended in lifting fuel from reservoir 10 may the main reservoir to the fuel outlet 9, or"

higher should the connections require it. In the presentembodiment the auxiliary be disposed adjacent the fuel outlet 9, and above the main reservoir 11, so as to provide an auxiliary supply of fuel at a less conduit distance from'the' fuel outlet 9 than the main reservoir. In the preferred arrangement, therefore, the pipe l t conducting the fuel from the main reservoir 1 to the auxiliary reservoir, delivers the fuel I of fuel in the auxiliary reservoir, the

of connection between the chamber, or auxiliary reservoir comprises upper and lower metallic plates 16 and 17 to the auxiliary reservoir above the'level in the main reservoir, and also "above the level oint pipe 14: an the auxiliary reservoin being lndicated at 15. The auxiliary reservoir is air tight except for certain openings hereinafter referred to,

so that suction in the air passageway above referred to will be efiective for the introduc tion' of fuel from the main reservoir to the auxiliary reservoir and for the delivery of fuel from the auxiliary reservoir to the fuel outlet 9. In the embodiment illustrated, the

between which a cylindrical glass wall 18 forming the sides of the receptacle is held by means of the bolts 19, a li uid-tight joint being provided where the cy inder 18.meets the plates 16, 17. Under certain conditions it may be desirable to introducesome fuel directly into the reservoir 10 independently ofthe su p1 from the main reservoir, and

' i to provi e or such introduction a funnel ."Qeo,

L ,10, a valve 21 being em loyed to open and 20 communicates through the top plate 16 with the interior of the auxiliary reservoir close the duct leading rom the funnel to the. reservoir.

.The fuel outlet from the conduit 8 is pref 'erably of such a character as to be control- 'of the needle valve by naeaoee lable by a needle valve 22-which maybe urged inwardly toward closing position by the spring 23, and is cooperatively connected with the throttle valve 7, 'so that the operation of the throttle valve operates the fuel outlet valve, or needle valve, 22. In the present embodiment the throttle valve 7 is a butterfl valve pivoted in the air passageway and aving an arm 24 and suitable connections for manual control, as before referred to. Rotating with the valve 7 isa cam 25 pivotally connectedat- 26 to an'a'rm 27 rotatable with the valve 7 said cam being adjustable so as to vary its eccentricity by shaft 32 having at one end an arm 33 provided with a roller 34 to cob crate with the cam 25, and havin at the-0t er end an arm 35 cooperating wlth the needle valve 22. As the throttle valve 7 is manually operated in an opening direction, the cam 25 cooperates with the roller 34' to open the needle valve, the movement of the valve in the opposite direction permitting the spring 23 to move the needle valve toward closing position. In order to provide forthe operation the throttle valve, as just described, as wel as permit the manual operation of the needle valve independently of the throttle valve, the needle valve 22 is adjustable, as by its stem' being threaded in a member 36 with .which the arm 35 directly cotiperates to open the needle valve, the member 36 being forked as at 37 to engage the flat sides 38 of the bearing 39'through which the needle valve projects. By this construction it will be seen that though the needle valve may be in a position determined I by the operation of the throttle, it may be adjusted relatively to the outlet 9 independ ently of the adjustment effected by the throt: tie, the rotation of the needle valve in the member 36 eflectin the independent adjustflexible shaft 40 having two pins 41 loosely engaging a piece 42 clamped to the stem of this valve, and -adjustable on the stem bL threaded engagement therewith. To yieldingly' hold the stem against rotary movement, a spring 43 carried by the member 36 engages t lock-nut 45.

As the pressure in the air passageway reduces under the influence of the suction .of the engine, air is drawn-iii through said e toothed periphery of a piece 44 threaded on the stem for ad ustment there-'- with, and held in adjusted position by a passageway, the throttle valve and the needle no naaaoss I auxiliary reservoir. When the auxiliary reservoir has filled sufficiently to cover the openings 13, or just prior to the liquid level covering such openings, the continued suction through the conduit 8 will result in the delivery of fuel through the conduit toward the outlet 9, mixed with some gas from the auxiliary reservoir should the opening 13 be not completely covered. Under these cir-' cumstances the mixture of gas and fuel delivered through the conduit 8 may varyin proportions, and as the main air for combustion will be introduced through the passageway controlled by the throttle valve, it conduces to better eiiiciency to lace suf ficient fuel in the auxiliary reservolr through the funnel 20 so as to provide a substantial depth of fuel above the openings 13, but leaving a space in the reservoir above the fuel which is filled by gas or air, as the conditions of operation may determine. Under such circumstances fuel alone will be drawn through the conduit 8, the valve 21 being of course closed. Assuming the auxiliary reservoir to have been partially filled as just stated, the auxiliary reservoir will serve as a combinedgas' and fuel chamber, and when the external ressure at the fuel outlet 9 reduces below t at in the auxiliary reservoir, the gas in said reservoir will expand and thereby efi'ect delivery of fuel to the outlet from the auxiliary reservoir, and delivery of fuel from the main reservoir to the auxiliary reservoir, the latter being directlythe result of the difference in pressure between atmospheric pressure acting on the surface of the liquid in the main reservoir and the reduced pressure in the auxil-' iary reservoir due to expansion of the gas therein. 1 The proper proportions of fuel and air delivered into the air passageway for known conditions may be determined .by setting the cam 25 so as to open the needle valve a proper amount for a certain opening of the throttle valve. Should the proper proportions of mixture be not effected through the cotiperative relation between the throttle and the needle valves, the needle valve may be adjusted by means of the flexible shaft 40 to regulate the outlet 9 until the proper mixture results. The flexible shaft 40, for operation, is connected to a button or arm 46 within convenient reach of the operator, preferably on the dash, as illustrated.

In order to provide for the automatic re- .gceipt by the auxiliary reservoir from the main reservoir of sufficient fuel to cover the normal entrance for fuel 13 to ,a substantial depth, and provide the air or gas chamber above the surface of the fuel in the auxiliary reservoir, an opening is provided in the aux iliary reservoir through which gas may escape as the liquid rises in the auxiliary reservoir above the openings 13, this opening being disposed at such a point as to assure the provision of an expansible body of gas or air in the auxiliary reservoir above the surface of the fuel therein. In the present embodiment the opening for the escape of air or gas is provided by a port which establishes communication between the interior of the auxiliary reservoir and the conduit 8 leading to the fuel outlet 9. The port, indicated at 47, above the normal entrance 13, leads from'the conduit 8 and opens into .the auxiliary reservoir, so that gas is trapped by the fuel in the reservoir rising above this .i I

port. This port is spaced from the normal fuel entrance 13 relative to the depth of as the efficiency of the feeding of fuel increases'as the area of the port decreases, the port should be made as fine as possible consistent with permitting the air or gas to escape for the purpose before mentioned. In the present embodiment the port is a mere .pin opening of about ten one-thousandths of an inch in diameter, is continuously open, and is situated adjacent the top of the auxiliary reservoir so as to permit of as great a supply of fuel in the auxiliary reservoir as possible consistent with maintaining the gas chamber above the fuel.

It will now be perceived that the auxiliary reservoir is subjected to internal gas pressure for delivery of fuel to the fuel outlet 9, and it will be understood that the construction of the auxiliary reservoir is such that the gas trapped therein expands so as to exert pressure upon the liquid therein, thev arrangement of. said reservoir inthe present embodiment providing an airtight receptacle, except for the openings hereinbefore mentioned. In the operation of the device involving the passage or port 47, thesuction stroke of the engine reduces the pressure in the air passageway 5, 6, and the suction efi'ect resulting in the conduit 8, auxiliary reservoir 10.and main reservoir 11, effects feeding of fuel from the main reservoir to the auxiliary reservoir, and the auxiliary reservoir will continue to receive fuel until the fuel level has risen therein to cover the port 47, and while rising in the auxiliary reservoir some of the fuel will be drawn through the conduit 8 to the fuel outlet 9, together with some air or gas which is present in the-upper portion of the reservoir. When the port 47 is covered by the rising fuel, the main feed of fuel in the conduit 8 will be through the normal entrance 13, although a small portion thereof may be drawn into the conduit through the port 47. When the ort 47 is very small however, the amount 0 gas drawn therethrough is rather negligible in so far as deleteriously affecting the proportions of the mixture is concerned. a

From the foregoing it will be perceived that there is provided in the auxiliary reservoir a gas pressure above the fuel therein, which operates expansively to feed fuel to the outlet when the suction effect in the air passageway decreases below that in the auxiliary reservoir, and this whether the port 47 be present or not. In either instance the expansive energy of the air in the auxiliary reservoir assists in the feeding of the fuel and takes just so much load off the engine, thus increasing the efliciency of the latter. It will be observed that the disposition of the reservoirs and the fuel outlet. relative to each other is such that the conduit 8 and the pipe 14 may be in continuously open condition during the operation, thus avoiding the necessity for using check valves, floats, etc. With the continuously ogpen condition of the conduit 8, port 47, and pipe 14, it is preferred that the fuel level in the main reservoir be below that in the auxiliary reservoir, and that the port 47 be in a horizontal plane between that of the fuel outlet 9 and the pipe connection, or point wherethe pipe 14 connects with the main reservoir, indicated at 400, the connecting point of the pipe 14 with the aux; iliary reservoir being. in a plane between that of the port 17 and that of the fuel outlet 9. With such arrangement flooding of the auxiliary reservoir is avoided even though the apparatus be inverted, as may happenin an aeroplane, or accidentally.

In order to further increase the efficiency of the engine and to facilitate and secure its steady operation notwithstanding unskilful manipulation of the throttle valve,

means are provided for automatically controlling the vacuum effect in the air passageway adjacentthe fuel outlet under the influence of the suction. By the provision of this latter means, any tendency of the suction on the fuel inlet to decrease abnormally is counteracted by an increase in the vacuum effect in said passageway and vice versa, so that should the throttle valve be suddenly opened when the engine is operating at low speed, a sufficient vacuum effect in the passageway is maintained to efficiently feed fuel through the conduit 8, and as the engine speeds up the automatic means and means are provided adapted to yieldingly resist the opening movement of this automatic valve, the resisting effect of this means decreasing as the valve is opening. To this end, with the valve 50, which in the present embodiment is a-butterfly valve pivotally operating in the passageway, is arranged a member tending to close the same and to permit the valve to open, the closing effect of this member increasing as the valve is closing. The member is embodied in a weight 51 movable with the valve from a position of effective torque when the valve is shut to a position of substantially no torque when the valve is open, this weight being pivotally supported so that its turn- ,ing moment decreases asthe valve is opening, and becomes zero, or practically so, whenthe valve is fully open. Specifically, the weight 51 is connected to .a pivoted arm '52 to which the valve is in turn con-. nected, and the weight is adjustable on.

the arm 52- toward and from the pivotal axis thereof. Movement of the valve 51 in one direction is automatically efiected by an air motor adapted to be energized by the difference in pressure in the air passageway relative to the atmospheric pressure, 'the cylinder of such a motorbeing indicated at 53 connected to the outer wall of the passageway. The air motor comprises a cylinder 53 and a piston 54, the chamber 55 at one side of the piston being exposed to the 1 pressure in the passageway through the opening 56, and the-chamber at the other side of the piston communicating with the outer air by a restricted passageway 57 which may be made large or small in accordance with the rapidity of action desired, the passageway 57 providing, as it were, a means adapted to yieldingly restrain operation of the motor. The piston 54 is.

Patent, is

. the throttle valve be suddenly widely opened when running, thus tending to decrease the vacuum efi'ect in the air passageway, the

automatic valve will still retain its coni above construction and many apparently 15 widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and no in a limiting sense.

It is also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention, which, as a matter of language, might be said to fall therebetween.

Having described my invention, what I claim as new and desire to secure by Letters 1. In an apparatus of the character described, in combination, an internal combustion engine, a passageway adapted to lead fuel thereto, a fuel outlet adapted to deliver fuel to said passageway, a fuel reservoir adapted to supply fuel to said outlet,- and means for maintaining a gas for pres-' sure on the fuel in said reservoir so thatwhen the external pressure on the outlet is reduced said gas acts expansively to deliver fuel from said reservoir toward said outlet comprising a port adapted to establish communication between the interior of said reservoir and the fuel conduit leading to said outlet from the reservoir, passage through said port being restricted relative to that 1 through said conduit.

2. In an apparatus of the character described, in combination, an internal combustion engine, a passageway adapted to lead fuel thereto, a fuel outlet adapted to dea liver fuel to said passageway, a fuel reservoir adapted to supply fuel to said outlet, and mean's for maintaining a gas for pressure on the fuel in said reservoir so that when the external pressure onthe outlet isreduced said gas acts expansively to deliver fuel from said reservoir toward said outlet comprising a port adapted to establish communication between the interior of said reservoir and the fuel conduit leading to said outlet from the reservoir, passage through said port being restricted relative to that through said onduit, said port being above the normal entrance for fuel into said conduit from the reservolr.

3. In an apparatus of the character described, in combination, an internal combustion engine, a passageway adapted to lead fuel thereto, a fuel outlet adapted to deliver fuel to said passageway, a fuel reservoir adapted to supply fuel to said outlet, and means for maintaining a gas for pressure on the fuel in said reservoir so that when the external pressure on the outlet is reduced said gas acts expansively to deliver fuel from said reservoir toward said outlet comprising a port adapted to establish com munication between the interior of said reservoir andthe fuel conduit leading to said outlet from the reservoir, passage through said port being restricted relative to that through said conduit, the level of fuel in I said reservoir being below that of said fuel outlet. 7

4. In an apparatus of the character described, in combination, an internal combustion engine, a passageway adapted to lead fuel thereto, a fuel outlet adaptedto deliver fuel to said passageway, an auxiliary fuel reservoir adapted to supply fuel to said outlet, means for maintaining a gas for pressure on the fuel in said reservoir so that when the external pressure on the outlet is reduced said gas acts expansively to deliver fuel from said reservoir toward said outlet comprising a port adapted to establish communication between the interior of said res ervoir and the fuel conduit leading to said 3 outlet from the reservoir, passage through said port being restrictedrelative to that through said conduit, a main reservoir, and

p a pipe adapted to supply fuel to said auxiliary reservoir and in which main reservoir the fuel level is normally below that in said auxiliary reservoir, said port being in a horizontal plane between that of said fuel outlet and the pipe connection with the main reservoir, the connection of said pipe to the auxiliary reservoir being in a plane between fhat of said portand that of said fuel out- 5. In an apparatus of the character described, in combination, an internal combustion engine, a passageway adapted to lead fuel thereto, a fuel outlet adapted to deliver fuel to said passageway, a fuel reservoir adapted to supply fuel to said outlet,

and means for maintaining a gas for pres- I sure on the fuel in said reservoir so that when the external pressure on the outlet is reduced said gas act's expansively to deliver fuelfrom said reservoir toward said outlet comprising a port adapted to establish com- J munication between the interior ofsaid reservoir and the fuel conduit leading to said outlet from the reservoir, passage through said port being restricted relative to that through said conduit, said port being above the normal entrance for fuel into said conduit from the reservoir, the level of fuel in said reservoir being below that of said fuel outlet. r

6. In an apparatus of the character described, in combination, an internal combustion engine, a passageway adapted to lead fuel thereto, a fuel, outlet adapted to deliver fuel to said passageway, an auxiliary fuel I reservoir adapted tosupply fuel to said outlet, means for maintaining a gas for pressure on the fuel in said reservoir so that when the external pressure on the outlet is reduced said gas acts expansively to deliver fuel from'said reservoir toward said-outlet comprising a port adapted to establish communication between the interior of said reservoir and the fuel conduit leading to said outlet from the reservoir, passage through said port being restricted relative to that through saidconduit, said port being above the normal entrance for fuel into said con duit from the reservoir, a main reservoir, and a pipe adapted to supply fuel to said auxiliary reservoir and in which main reservoir the fuel level is normally below that in said auxiliaryreservoir, said'port being in a horizontal plane between that of said fuel outlet and the pipe connection with the main reservoir, the connection ofsaid pipe to the auxiliary reservoir being in a plane between that of said port and that of said fuel outlet.

7. In an apparatus of the character described, in combination, an internal combustion engine, a passageway adapted to lead fuel thereto, a fuel outlet adapted to deliver fuel to said passageway, an auxiliary fuel reservoir adapted to supply fuel to said outlet, means for maintaining a gas for pressure on the fuel in said reservoir so that when the external pressure on the outlet is reduced said gas acts expansively to deliver fuel from said reservoir toward said outlet comprising a port adapted to establish communication between the interior of said reservoir and the fuel conduit leading to said outlet from the reservoir, passage through said port being restricted relative'to that through said conduit, the level of fuel in said reservoir being below that of said fuel outlet, a main reservoir, and a pipe adapted to supply fuel to said auxiliary reservoir and in which main reservoir the fuel level is normally below that in said auxiliary reservoir, said port bein in a horizontal plane between that of said uel outlet and the pipe connection with the main reservoir, the connection of said pipe to the auxiliary reser-' -V01I' being in a plane between that of said port and that of said fuel outlet.

8. In an apparatus of the character described, in combination, an internal combustion engine, a passageway adapted to lead fuel thereto, a fuel outlet adapted to deliver fuel to said passageway, an auxiliary fuel reduced said gas acts expansively to deliver fuel from said reservoir toward'said outletcomprising a port adapted to establish communication between the interior of said reservoir and the fuel conduit leading to said outlet from the reservoir, passage through said port being restricted relative to that through said conduit, saidport being above the normal entrance for fuel into said conduit from the reservoir, the level offuel in said reservoir being below that of said fuel outlet, a main reservoir, and a pipe adapted to supply fuel to said auxiliary reservoir and in which main reservoir the fuel level is normally below that in said auxiliary reservoir, said port being in a horizontal plane between that of said fuel outlet and the pipe connection with the main reservoir, the connection'of said pipe to the auxiliary reservoir being in a plane between that of said port and that of said fuel outlet.-

9. In an apparatus of the character described, in combination, an internal combustion engine, a passageway adapted to lead 4 fuel thereto, a fuel outlet adapted to deliver fuel to said passageway, a fuel reservoir.

adapted to supply fuel to said outlet, and

meansfor maintaining a gas for pressure on the fuel in said reservoir so that whenv the external pressure on the outlet is reduced said gas acts expansively to deliver fuel from said reservoir toward said outlet scribed, in combination, an internal combustion engine, a passageway adapted to lead fuel thereto, a fuel outlet adapted to deliver fuel to said passageway, a fuel reservoir adapted to supply fuel to said outlet, and means for maintaining a gas for pressure on the fuel in said reservoir so that when the externalpressure on the outlet is reduced said gas acts expansively to deliver fuel from said reservoir toward said outlet comprising a port adapted to establish communication between the interior of said reservoir and the fuel conduit leading to said outlet from the reservoir, passage through said 'port being restricted relative to that through said conduit, said conduit being continuously open to said fuel outlet:

11; In an apparatus of the character described, in combination, an internal combustion engine, a passageway adapted to lead fuel thereto, a fuel outlet adapted to deliver for maintainlng a gas fuel to said passageway, a fuel reservoir adapted to supply fuel to said outlet, means forpressure on the fuel in said reservoir so that when the external pressure on the outlet is reduced said gas acts expansively to deliver fuel from said reservoir toward said outlet comprising a port adapted to establish communication between the interior of said reservoir and the fuel conduit leading to said outlet from the reservoir, passage through said port being restricted relative to that through said conduit, said conduit being continuously open to said fuel outlet, and a main reservoir adapted to supply said auxiliary reservoir and in continuously open communication therewith.

12. In apparatus of the character described, in combination, an internal combus' tion engine, a conduit adapted to supply liquid fuel thereto, acombined gas and fuel chamber adapted to deliver liquid fuel through said conduit under the influence of the suction of the engine, a main fuel reser-- voir adapted to deliver fuel to said chamber by said suction, and a port establishing communication between the interior of said chamber and said conduit, said port being of less area than the normal entrance for fuel to said conduit.

13. In an apparatus of. thecharacter described,-in combination, an internal combustion engine, a conduit adapted to supply liquid fuel thereto, a combined gas and fuel chamber adapted to deliver liquid fuel through said conduit underthe influence of the suction of the engine, a main fuel reservoir adapted to deliver fuel to said chamber by said suction, and a port establishing communication between the interior of said chamber and said conduit, said port being of less area than the normal entrance for fuel to said conduit and above said entrance.

14. In an apparatus of the character dew scribed, in combination, an internal combustion engine, a combined gas and fuel chamber, a conduit projecting into said chamber having a normal entrance for receipt of fuel therefrom under the influence of the suction of the engine, a continuously open port in said conduit within said chamber, of less area than said normal entrance and above the same, a main fuel supply adapted to deliver fuel tosaid chamber under the influence of said suction, and a manually operable valve adapted to control discharge of fuel through said conduit.

15. In an apparatus of the character described, in combination, an internal combus tion engine having a passageway for the introduction .of fuel, a manually operable valve adapted'to regulate the admission of air to said passageway, a fuel outlet adapted to be exposed to the pressure in said passageway between said valve and the engine,

an auxiliary fuel reservoir subjected to in-- ternal gas pressure for delivery of fuel therefrom to said outlet, a main reservoir adapted to deliver fuel to said auxiliary reservoir, the said elements being so arranged that when the pressure in said passageway reduces below that in said auxiliary reser voir the gas in said reservoir expands, there by eflecting delivery of fuel to said outlet from said auxiliary reservoir and delivery of fuel from said main reservoir to said auxiliary reservoir, and a continuously open port adapted to establish communication'ber tween the interior of said auxiliary reser voir and the conduit leading therefrom to said outlet, said port being spaced from the HAROLD CABLE.

Witnesses:

KARL W. SMITH, JAs. A. Homers. 

